| 摘要: |
| 根据薄片、铸体薄片、压汞、阴极发光等研究,详细描述了南羌塘盆地扎仁古油藏白云岩的储层特征,并对白云岩成因作了初步研究。认为该白云岩在沉积期后变化中经历了多种成岩作用改造,其中影响白云岩储集性的作用主要有白云石化作用、溶蚀作用、重结晶作用和构造应力作用,对白云岩孔渗改善起了积极作用。白云岩主要储集空间为晶间孔、晶间溶孔,储集物性良好。广泛发育的白云石环边结构等淡水成因标志表明,该区白云岩是通过大气水-海水孔隙混合流体交代灰岩所形成的。 |
| 关键词: 扎仁 白云岩 储层 南羌塘盆地 青藏 |
| DOI： |
| 附件 |
| 投稿时间：2006-02-10 |
| 基金项目:国家油气专项“青藏高原油气资源战略选区调查与评价”。 |
|
| Dolostone reservoirs and their genesis in the Zaring oil pool in southern Qiangtang Basin |
| CHEN Wen-bin, YANG Ping, ZHANG Yu-jie, PENG Zhi-min |
| (Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China) |
| Abstract: |
| The present paper gives a detailed description of the dolostone reservoirs and their genesis in the Zaring oil pool in southern Qiangtang Basin on the basis of thin sections,cast sections,capillary pressure curves and cathodeluminescent images.The dolostones have experienced several types of postdepositional diagenetic modifications,of which dolomitization,dissolution,recrystallization and tectonic stress processes have exerted an important effect on porosity and permeability.The accommodation spaces include intercrystal pores and intercrystal solution openings.The well-developed rimmed textures indicate that the dolostones in the study area resulted from the diagenetic replacement of limestones by mixed meteoric-marine pore fluids. |
| Key words: Zaring dolostone reservoirs southern Qiangtang Basin Qinghai-Xizang Plateau |
